0c34b6e781
- Remove CAS, as it no longer works for us - Remove other checks - Implement 15 minute greet timeout check - Fix chat logos - Ditch thirdparty logger, use stdlib log facility wrapper for logging
82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
package moon
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import (
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"strconv"
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"strings"
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"github.com/NicoNex/echotron/v3"
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)
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// greetMention renders a clickable mention of a newcomer for use inside a
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// greeting, or "" when the user cannot be mentioned at all.
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//
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// The mode is HTML, not markdown, and that is a correctness decision rather than
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// a preference: the label is a name Telegram gave us, and MarkdownV2 requires
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// escaping eighteen characters — "-" among them — so an ordinary "Анна-Мария"
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// would be rejected with a 400. A rejected greeting makes newChatMembers delete
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// the join event, which is how one hyphen would disable the only detector. HTML
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// needs "&", "<" and ">" escaped, and those essentially never occur in a name.
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//
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// The mention works without a @username, which is the common case for someone who
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// has only just joined a public group.
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func greetMention(u *echotron.User) string {
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if u == nil || u.ID <= 0 {
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return ""
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}
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var b strings.Builder
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b.WriteString(`<a href="tg://user?id=`)
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b.WriteString(strconv.FormatInt(u.ID, 10))
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b.WriteString(`">`)
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for _, r := range mentionLabel(u) {
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switch r {
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case '&':
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b.WriteString("&")
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case '<':
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b.WriteString("<")
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case '>':
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b.WriteString(">")
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default:
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b.WriteRune(r)
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}
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}
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b.WriteString("</a>")
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return b.String()
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}
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// escapeHTML escapes the three characters HTML requires. It exists for callers
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// that assemble markup themselves; the greeting path uses greetMention's own
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// single pass so the anchor and the label cannot drift apart.
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func escapeHTML(s string) string {
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return htmlReplacer.Replace(s)
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}
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// mentionLabel is the text shown inside the mention link, in the preference order
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// a reader expects: full name, then either name alone, then the @username, and
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// finally the bare id so the link is never empty.
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func mentionLabel(u *echotron.User) string {
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if name := strings.TrimSpace(u.FirstName + " " + u.LastName); name != "" {
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return name
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}
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if u.LastName != "" {
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return u.LastName
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}
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if u.FirstName != "" {
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return u.FirstName
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}
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if u.Username != "" {
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return "@" + u.Username
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}
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return strconv.FormatInt(u.ID, 10)
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}
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/* vim: set ft=go noet ai ts=4 sw=4 sts=4: */
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